How do you balance your original wheels? Because my mechanic can’t balance them only with lead inside. Thank you
This response may not be what you are seeking.
You may be asking two different questions. “Original” wheels may have been "originally" balanced with “older-style” conventional weights that pinched or "clipped-on" the rim lip. This includes both the inner and outer rim. My two "original", never used, inner tube-equipped spare tires and rims have small weights on both sides of the rim. I am guessing that when new, the original alloy wheels used the clip on style weights. The adhesive and foam backing on tape weights of that era were not as durable as today's offerings.
For aesthetic reasons, wheel weights can be placed on the inner side of the rim, including the rim barrel itself. Despite your reservations, newer, self adhering “tape weights,” stick well to "clean" surfaces. Visit a high volume tire store and note the number of rebalanced rims with vestigial adhesive and the effort used to safely remove it. As to your photo with the arrow, there are any number of acceptable means to achieve dynamic wheel and tire balance. This might include using the ample "flatter" surface area for wheel weights or even rotating tire on stationary rim.
Good luck.